Asbestos shingle



J. A. SCHARWATH AND C. R. BURKHARDT.

ASBESTOS SHINGLE.

APPLICATION FILED 00131. 1919.

l ,401 483. Patented Jan. 24, 1922.

. W, %M/A/ UNITED STATES PATENT OFFICE, 4 JOE-N A. scnmwarn, onemzunrn,Am) CUR'J. n. nunxnanm', on m JERSEY.

Annex, NEW

asnnsros snmenn Specificatioh of Letters Patent. Patent d J 24 92Application me October 31,1919. Serial No. 834,828.

i Toall whom it may concern f 'Be it known that we, J GEN A. SCHARWATH acitizen of the United States of America, and a resident of Elizabeth,Union County and State of New Jersey, United States of America,and-GURTR. BURKHARDT, a citizen of the United States of America, and aresident of Teaneck, Bergen County, and State .of New Jersey, haveinvented certain new and useful Improvements in Asbestos Shingles, ofwhich the following, is a specification, reference being had to theaccompanying drawing, forming a part thereof.

Our present invention relates to artificial roofing slates or shinglesand is in part a division from application, Serial Number 189,405,Patent Number 1,291,395 of Januf ary 14, 1919.

v The objects of the" invention are to provide an article of thischaracter which will be strong, durable, relatively light in weight,ornamental in appearance and which will be free of the glare ordinarilypresent in roofs of artificial shingle or tile.

A further special objectof the invention is to provide a cement shinglewhich will be hereinafter described and illustrated in the of taperedformation, but which at the same time will have a substantially uniformthickness of wall and distribution of- Weight throughout its length. 4

These objects we have accomplished by a novel construction and relationof parts,

accompanying drawing, wherein:

Figuresl and 2 are perspective views illus; trating the u per andlowerfaces respectively of one orm of the shingle.

Figure 3 is a transverse sectional view taken through the shmgle ataboutits m1ddle. I

Figure 4 is a perspective view of one of the ossible modifications ofthe invention.

7 T 'e shingle or artificial slate of this invention comprises a slab ofasbestos cement, tapered in thickness from one end to the ot er asindicated at1 5 and provided in the .back thereof, at the lower thickerend, with recesses 01'' depressions 6, said recesses being separated anddefined by an interveningrib .or ribs 7, These recesses are shown asexthe tending longitudinally throughout greater portion of the thickenedsection of the shingle and as tapering in depth from,

the lower to the upper end thereof to accord with the reduced thicknessof the shingle and so produce a. substantially even thickness of walland distribution of weight throughout theshingle. The intervening rib orribs 7 strengthen and support the reduced or thinned portion of theshingle, reinforcing and preventing breakage of the same. In the firstform disclosed, there are only two depressions 6, but in Figure 4 wehave illustrated three such -de ressions, with two in tervening ribs 7and it will be apparent that this number may be increased, if desired.

Preferably, the under side of the shingle at the upper end thereof isleft substantially flat as indicated at 8 to provide a firm base orengagement with the roofing support. The shingles are usually laid 'withthe upper portions thereof in edge to edge contact and the lowerportions of the shingles may be reduced as indicated at 9 to providespaces between adjacent edges of the exposed portions of the shingles.

Another feature of improvement is the beveling of the lower exposededges of the shingles as indicated at 10. This not only serves to makethe walls at the outer fillets of the recesses of substantially the samethickness as the other walls and to reduce the weight of the lowerthickened portion of the shingle but produces a certain ornamentaleffect which may .be heightened by roughing such beve slate. Thisbeveling of the exposed edges is of further advantage, in that itassists inshedding moisture more rapidly.

The exposeduuppe'r face of the shingle ribbed or corrugated asindicated, for example, in Figure 1 which shows the exposed edges,asshown, to represent for instance the edges of natural surface brokenby a plurality of substantially parallel longitudinally extending ridges11- and by substantially transversely extendingparallel curvedintersecting.

ridges 12, the ridges being of comparatively small height or in otherwords merely of a This form taper from one end to the other, re-

cesses of gradually increasing depth in the u back of the shingleextending throughout the thicker portion thereof to provide asubstantially unifornr distribution of weight, the upper surface of theshingle being broken by straight parallel ridges and transverse curvedridges and beveled and roughened exposed edges.

I 2. A press molded asbestos cement shingle having the upper surfacethereof broken by substantially straight parallel ridges intercepted bytransverse curved ridges and further having beveled and roughenedexposed ed es. Y

n witness whereof, we have hereunto set our hands, this 29th day ofOctober, 1919. JOHN A. SCHARWATH. CURT R. BURKHARDT.

